IPA: /ˌʌnˈvæksɪneɪtɪd/
KK: /ʌnˈvæksɪneɪtɪd/
Describing someone or something that has not received a vaccine.
The unvaccinated individuals were advised to take extra precautions during the outbreak.
Unvaccinated → It is formed from "un-" (meaning not) and "vaccinatus" (from Latin "vaccinare", meaning to inoculate or vaccinate). The word "unvaccinated" means not having been inoculated or vaccinated against a disease.
Think of 'not' ('un-') having been 'inoculated' ('vaccinatus') — that's why unvaccinated means not having received a vaccine.